docs: remove unnecessary references to the name of each program

docs/npc.1

@@ -17,14 +17,18 @@ npc
 
 .SH DESCRIPTION
 
-Npc reads from standard input and writes to standard output, replacing non-
-printing characters with printable equivalents. Control characters print as a
-carat (“^”) followed by the character “@” through “_” corresponding to the
+Print normally non-printing characters.
+
+The program reads from standard input and writes to standard output, replacing
+non-printing characters with printable equivalents. Control characters print as
+a carat (“^”) followed by the character “@” through “_” corresponding to the
 character replaced (e.g. control-X becomes “^X”). The delete character (0x7F)
 becomes “^?”. Characters with the high bit set (>127) are printed as “M-”
 followed by the graphical representation for the same character without the
 high bit set.
 
+.SH USAGE
+
 .B -e
 .RS
 Prints a currency sign (“$”) before each line ending.
@@ -37,12 +41,12 @@ Prints tab characters as “^I” rather than a literal horizontal tab.
 
 .SH DIAGNOSTICS
 
-Npc prints a debug message and exits with the appropriate sysexits.h(3) error
-code in the event of an error, otherwise it exits successfully.
+In the event of an error, a debug message will be printed and the program will
+exit with the appropriate sysexits.h(3) error code.
 
 .SH BUGS
 
-Npc operates in single-byte chunks regardless of intended encoding.
+The program operates in single-byte chunks regardless of intended encoding.
 
 .SH RATIONALE
 
@@ -51,8 +55,8 @@ using a standard tool. A popular extension to cat(1p), the
 .B -v
 option, is the bandage solution GNU and other software suites use.
 
-This functionality should be a separate tool because its usefulness extends
-beyond that of cat(1p).
+This functionality is a separate tool because its usefulness extends beyond that
+of cat(1p).
 
 .SH AUTHOR